The Original Demon (Nanatsu No Taizai)

Summary

Originally created by the Demon King to help control the underworld, The Original Demon rebelled against the King in order to take his throne. As his punishment for this act of rebellion, the Demon King split The Original Demon into Chandler and Cusack, instructing them to raise Meliodas and Zeldris to be the next Demon King.

Attack Potency:Small Country level (His mere presence was enough to dispel the darkness surrounding Meliodas’ cocoon, which Ludoshel in a vessel struggled to break into. Merlin stated that her, Escanor, and Ludoshel’s chances of victory were gone upon seeing him), higher with Crisis (Eventually managed to overpower Ludoshel in his True Body)

Speed: At least Massively Hypersonic+ (Holds the combined power of Chandler and Cusack, who are capable of keeping up with a serious Ludoshel who easily outsped daytime Escanor)

Weaknesses: All Demons are vulnerable to Holy Magic, as it breaks down Darkness particles. Note however that high-level demons have shown to take only minor damage from beings near their own level, implying the vulnerability is not extreme. The regeneration used by demons heals injuries but not the "damage" dealt. In practical terms, this has shown to mean that the more a demon regenerates the weaker they get, eventually reaching the point where they no longer have the energy to regenerate at all.

Notable Attacks/Techniques:

Crisis: His power gets magnified as his life whittles down.

Demon: The Original Demon is the highest level of demon and can access his demonic biology and powers to give himself a boost in physical ability as well as various other advantages. At night, his magic power increases.

Power of Darkness: As part of his demon biology, The Original Demon can generate solid darkness from his body which he can manipulate and shape as well as project outward from himself. He can use this black matter for a variety of offensive, defensive, and supplementary purposes.

Enhanced Durability: Demons can use their black matter as a thin but powerful layer of armor to enhance their defensive capability.

Flight: When the substance covers his body he can use it to manifest wings and fly.

Self Healing: Demons can use the dark substance to pull their bodies back together, mend burn injuries, etc. However, they cannot regenerate destroyed hearts, and damage stays with the demon despite the wound being healed. This has been shown to mean that powerful enough attacks cannot be regenerated by a weaker demon, and they will eventually run out of enough energy and not be able to continue regenerating. Demon blood has also shown to possess potent regenerative properties, demonstrated when Fraudrin (through Dreyfus) regenerates Gray Demon Hendrickson from just a head, half a torso, and an arm.

Weapon Creation: The black matter can be used to form various offensive constructs such as large claws or weapons. These constructs enhance melee attacks a considerable amount.

Soul Extraction and Absorption: Demons can extract souls and absorb them to restore their magic power as well as gain the knowledge of their victim. Both lesser demons and high-level demons have been shown extracting many souls at once from a distance, although some seem to prefer using touch to extract souls. When a soul is eaten it is completely destroyed, removing the victim from the cycle of reincarnation.

Crimson Requiem: His Chandler half creates an aura of heat around his hand and sends it at his opponent, melting the ground beneath him in the process. It is stated to be able to melt the Heavy Metal technique of the Giant Clan.

Full Counter: His Chandler half can reflect magic attacks back at his opponent with at least double the original power, provided he properly times his counter. Chandler has shown to be able to reflect several attacks at once, provided they are all coming directly to him. Chandler was the one who taught the power to Meliodas. Chandler needs one second between Full Counters.

Magical Defensive Wall: Chandler can create a magical barrier around himself to guard against incoming attacks. It was able to offset enough damage from King's and Gowther's Celestial Arrow that he only received minor injuries.

Split Tama: Chandler rips off some of his flesh and shapes it into small winged demons that follow his orders. They possess deceptive power for their size and appearance, capable of injuring Elizabeth with her power and memories restored, and are actually more powerful than Chandler's Grudge Blade, which did not do much to her. Their durability is much lower, however, being easily killed by Post-Training Diane. He can reabsorb their bodies after they die.

True Night: Chandler's magic power is immense enough to shroud the entire region around him in darkness. Stars are visible in the sky and according to Merlin he brings "true night." This ability allows him to constantly benefit from the Demon Clan's increase in magic power at night.

Wind Magic: Chandler releases a spherical aura of cutting winds around himself. He used this unnamed technique to dismember Ban.

Absolute Order: His Cusack half would draw a symbol on his hand and point it at his target, who then has to follow his orders. Disobediance results in the victim's death. Even smearing the symbol will not remove the Order. It is stated that any human would die from resisting.

Placed orders on lesser demons

Resonant: As Cusack he formed a link with his victim by making eye contact with them. When he activates Resonant, his eye and his victim's eye glow the same color and the victim is forced to mimic his movements, even when they are hundreds of miles away. His Cusack half forced King Arthur to plunge his own sword into his chest.